rhodann.

Brit.

/ˈrəʊdan/, U.S.

/ˈroʊˌdæn/

Origin: A borrowing from German. Etymon: German Rhodan.

Etymology: < German Rhodan ( J. J. Berzelius Lehrbuch der Chem. (ed. 5, 1843) I. 829) < ancient Greek ῥόδον rose (see rhodo- comb. form) + -an (in Cyan cyan n.; compare cyanogen n.).

Chemistry. Now rare.

= thiocyanogen n. at thio- comb. form 1; (also) the thiocyanate ion or radical (—SCN). Frequently attributive.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic salts > [noun] > cyanides

sulphocyanide1841

platinocyanide1845

valeronitrile1847

rhodan1849

Everitt's salt1890

acrylonitrile1893

Zyklon B1939

TCNQ1960

propenenitrile1963

the world > matter > chemistry > organic chemistry > organic salts > [noun] > cyanates > sulphocyanates

sulphocyanate1830

sulphocyanuret1833

sulphocyanodide1838

rhodan1849

1849 R. Kane Elements Chem. (ed. 2) xix. 751 These sulpho-cyanides may be considered either as double sulphurets of cyanogen and of a metal, as Cy.S + S.K, &c., or as salts of the compound radical sulpho-cyanogen, CyS₂ + K, &c... Berzelius has proposed to term this hypothetic radical, Rhodan, and its salts rhodanides.

1892 Lancet 16 July 158/2 Veratrine and physostigmine cause only a slight acceleration of the rigor mortis, but with caffeine and its chemical derivatives—the rhodan salts—this acceleration becomes considerable.

1918 Jrnl. Amer. Chem. Soc. 40 637 In the case of acetic acid only two rhodan derivatives or corresponding esters are to be taken into account.

1948 Science 16 July 63/2 All the chlorides and the rhodan present in the saliva were removed by the treatment.

Derivatives

rhoˈdanic adj. rhodanic acid n. = thiocyanic acid at thio- comb. form 1.

ΘΚΠ

the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing sulphur > others

hydrosulphuric acid1823

rhodanic1852

persulphuric acid1878

thiolinic acid1899

thiomalic acid1905

1852 W. T. Brande Dict. Sci., Lit. & Art (ed. 2) Suppl. 1395/2 Rhodanic acid, a chemical synonym of sulphocyanic acid.

1903 Jrnl. Amer. Chem. Soc. 25 367 In this they resemble the corresponding products of rhodanic acid.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhodan
释义	rhodann. Brit. /ˈrəʊdan/, U.S. /ˈroʊˌdæn/ Origin: A borrowing from German. Etymon: German Rhodan. Etymology: < German Rhodan ( J. J. Berzelius Lehrbuch der Chem. (ed. 5, 1843) I. 829) < ancient Greek ῥόδον rose (see rhodo- comb. form) + -an (in Cyan cyan n.; compare cyanogen n.). Chemistry. Now rare. = thiocyanogen n. at thio- comb. form 1; (also) the thiocyanate ion or radical (—SCN). Frequently attributive. ΘΚΠ the world > matter > chemistry > organic chemistry > organic salts > [noun] > cyanides sulphocyanide1841 platinocyanide1845 valeronitrile1847 rhodan1849 Everitt's salt1890 acrylonitrile1893 Zyklon B1939 TCNQ1960 propenenitrile1963 the world > matter > chemistry > organic chemistry > organic salts > [noun] > cyanates > sulphocyanates sulphocyanate1830 sulphocyanuret1833 sulphocyanodide1838 rhodan1849 1849 R. Kane Elements Chem. (ed. 2) xix. 751 These sulpho-cyanides may be considered either as double sulphurets of cyanogen and of a metal, as Cy.S + S.K, &c., or as salts of the compound radical sulpho-cyanogen, CyS₂ + K, &c... Berzelius has proposed to term this hypothetic radical, Rhodan, and its salts rhodanides. 1892 Lancet 16 July 158/2 Veratrine and physostigmine cause only a slight acceleration of the rigor mortis, but with caffeine and its chemical derivatives—the rhodan salts—this acceleration becomes considerable. 1918 Jrnl. Amer. Chem. Soc. 40 637 In the case of acetic acid only two rhodan derivatives or corresponding esters are to be taken into account. 1948 Science 16 July 63/2 All the chlorides and the rhodan present in the saliva were removed by the treatment. Derivatives rhoˈdanic adj. rhodanic acid n. = thiocyanic acid at thio- comb. form 1. ΘΚΠ the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing sulphur > others hydrosulphuric acid1823 rhodanic1852 persulphuric acid1878 thiolinic acid1899 thiomalic acid1905 1852 W. T. Brande Dict. Sci., Lit. & Art (ed. 2) Suppl. 1395/2 Rhodanic acid, a chemical synonym of sulphocyanic acid. 1903 Jrnl. Amer. Chem. Soc. 25 367 In this they resemble the corresponding products of rhodanic acid. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1849
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